What to replace while stuff is apart for timing belt?
 

Recently purchased a UrS6 with 156k on it. Needs a good amount of work. Timing belt is overdue, so I will be tackling that soon (any ideas where I can find the 3256 tool)? What else should I be changing while I'm in there? I already purchased the 2 plastic coolant fittings that like to crack. Are there any sensors I should be replacing as well?

One or more idlers/pulleys sound like hell, is this usually remedied by replacing the serpentine tensioner pulley/timing belt idler?

Also any idea what is going with quattroworld/motorgeek registration? I can't seem to be able to make an account on either forum and they seem to be the more active ones for this platform. Thanks for the help.

It's pretty standard procedure to also replace the timing belt and idler roller. The lower timing belt sprocket is often replaced, as well as the crankshaft bolt and crank seal. The camshaft seal is something to consider replacing.